Not quite - Radeon X1800 in this case was benchmarked at 594MHz and has 16 pixel/shader pipes and GeForce 7800 in this case was a 550MHz part with 24 pipes, so we have a fillrate/shader-rate of 9504 of the Radeon to go against the 13200 (shader-rate - 16ROPs) of the GeForce 7800.
Radeon's shader-rate is 72% of GeForce's,
yet the 3DMark06 score of the X1800 is 76% of the score of GeForce 7800 GTX 512 - how's that for a comparison? ;-)